Death Note-Episode 16

This is getting confusing. I don't understand what Light is up to. Why did he forfeit the death note. What's the point! And how did those criminals die after Light forfeited the ownership of the death note.

Is this possible- Write the deaths of criminals in the death note scheduled for after a week, then forfeit the ownership of the death note and those criminals will still die on the scheduled time? I mean, this is the only explanation for how those criminals were killed even after Light forfeited the ownership of the death note.

I'm too human (that means someone with a normal mentality) to understand why Light did this. Is it because he knew this would confuse L. But he could have pulled this off by just acting, pretending. Why such a drastic step! Now, he doesn't have any memories of the death note or the shinigami. That means he can't go killing criminals, unless my theory of the death note I mentioned earlier was true. This anime is history in that case....or may be not...now it'll just be about how L takes this all. Because technically the entire Kira drama is over now.

Anyway, I just want to repeat this- I hate Light. His poor father. He is taking it so hard on himself. Also poor L. He is so confused and he has so much responsibility on his shoulders.